Regular ArticleElectrokinetic Properties of Perlite
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Effective treatment of simulated ASP flooding produced water by modified perlite
2022, Colloids and Surfaces A: Physicochemical and Engineering AspectsOn copper removal from aquatic media using simultaneous and sequential iron-perlite composites
2021, Journal of Water Process EngineeringCitation Excerpt :Perlite is chemically inert and its surface remains negatively charged in the water of a pH of 7 [29,32] and perlite has no isoelectric point, no point of zero charge pHpzc in the pH range 3–11 as perlite exhibits permanent negative zeta potential values (mV) across that pH range [15,29,33] due to 1) dissociation of the surface hydroxyl groups, and 2) occurrence of crystal lattice changes leading to some alumina-silica interlay in the surface structure [29,32]. Additionally, the zeta potential for expanded perlite in water is higher than the non-expanded [15,34] possibly resulting from increasing broken particle edges during the expansion process [29,33,34]. These characteristics explain the high affinity of the perlite surface to divalent cations (e.g. Cu2+ and Fe2+ in our example) [15]; see further evidence via the supportive characterisation displayed below.
Ultra-high surface area nano-porous silica from expanded perlite: Formation and characterization
2017, Ceramics International
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